example negation

Could someone give me an example for negation in matlab. I am a bit new and only know + - and stuff and not true false if else for example so if you use something aside from arithmetic basic operations could someone also explain thoose for the full understanding? Would have been so great! Thank you in advance!

Tor

Answer 1

[Wayne King]

Hi Tor, welcome to MATLAB. You should spend some time reading the Getting Started Guide. Particularly, the section: Programming -> Flow Control

For example:

a = true;  % a is a logical variable
if ~a
disp('Hi');
else
disp('Bye');
end

The above displays Bye because ~a is "not a" which is false, so the if statement evaluates to false and the else statment is evaluated.

MATLAB has countless variations on this theme:

   X = randn(10,1);
   if any(X)   %check to see if there are any nonzero elements in X
   disp('Hi');
   else
   disp('Bye');
   end

any(X) is true and so Hi is displayed. Think for yourself when would ~any(X) be true? What would X have to be like?